I was approved for my ssdi a couple months ago and never heard anything else afterwards. Yesterday, I got a check for the back pay in the mail for much, much less than what I expected...like about half. I read on here once before that they mailed someones dependant check separate from their own for the lump payment. Is this true, and could I have gotten the dependent check first??? Please, please respond if anyone has had this. Thanks so much for reading and replying.